RaspberryPi type A+ (Raspberry Pi)
The Raspberry Pi is a credit-card sized computer board that's up and running when a keyboard, mouse, display, PSU and MicroSD card with installed OS are added. It’s a miniature ARM-based PC which can run .
Like the Model A, the Model A+ uses the BCM2835 application processor and has 256MB RAM, but it is significantly smaller (65mm in length, versus 86mm for the Model A), consumes less power, and inherits the many improvements that we made to the Model B+, including:
- More GPIO. The GPIO header has grown to 40 pins. The Model A+ is compatible with the HAT standard for add-on boards.
- Micro SD. The old friction-fit SD card socket has been replaced with a much nicer push-push micro SD version.
- Better audio. The audio circuit incorporates a dedicated low-noise power supply.
When we announced Raspberry Pi back in 2011, the idea of producing an “ARM GNU/Linux box for $25″ seemed ambitious, so it’s pretty mind-bending to be able to knock another $5 off the cost while continuing to build it here in the UK, at the same Sony factory in South Wales we use to manufacture the Model B+.
More information :
- Broadcom BCM2835 700MHz ARM1176JZFS processor with FPU and VideoCore IV dual-core GPU
- GPU provides Open GL ES 2.0, hardware-accelerated OpenVG, and 1080p30 H.264 high-profile decode
- GPU is capable of 1Gpixel/s, 1.5Gtexel/s or 24GFLOPs with texture filtering and DMA infrastructure
- 512MB SDRAM (Model B+), 256MB SDRAM (Model A+)
- HD 1080p video output
- Composite video (PAL/NTSC) output
- Stereo audio output
- 10/100 BaseT RJ45 Ethernet socket (Model B+)
- HDMI 1.3 & 1.4 video/audio socket
- 3.5mm 4-pole audio/composite video out jack socket
- 4 x USB 2.0 sockets (Model B+), 1 x USB 2.0 socket (Model A+)
- 15-way MPI CSI-2 connector for Raspberry Pi HD video camera (775-7731)
- 15-way Display Serial Interface connector
- MicroSD card socket
- Boots from MicroSD card, running a version of the Linux operating system (See Note below)
- 40-pin header for GPIO and serial buses (compatible with Raspberry Pi Model A/B 26-pin header)
- Header footprint for JTAG connector
- Power supply: +5V @ 2A via microUSB socket
- Dimensions: 86 x 56 x 20mm (Model B+) 66 x 56 x 14mm (Model A+)
- Firmware now looks for add-on boards that comply with the HAT (Hardware Attached on Top) design rules. This allows the Raspberry Pi A+/B+ to set up the GPIO and load drivers to suit an expansion board automatically.